package org.forex.api.web.async;

import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;


@WebFilter(asyncSupported=true,urlPatterns="/*")
public class AppManager implements Filter{

	
	private static ThreadLocal<AppContext> appContext=new ThreadLocal<>();
	
	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		try{
			appContext.set(new AppContext());
			arg2.doFilter(arg0, arg1);
		}finally{
			appContext.remove();
		}
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	
	public static AppContext getAppContext() {
		return appContext.get();
	}

	public static class AppContext{
		
		public static final ExecutorService executor=Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()*2);
		
	}
	
}
